60 ... Silva & al.
Diplococcium variegatum S.S. Silva, Gusmão & R.F. Castañeda, sp. nov. F. 1
Diers from Diplococcium parcum by larger limoniform to ovoid conidia and the
variably colored conidiogenous cells.
T: Brazil. Bahia State: Santa Teresinha, Serra da Jibóia, on decaying leaves of an
unidentied plant, 19.II.2009; coll. S.S. Silva. (Holotype: HUEFS 194254).
E: Latin, variegatum, referring to the variable coloration of the conidiogenous
cells and conidia.
C euse, hairy, brown. Mycelium supercial and immersed in
substrate. C macronematous, mononematous, erect, straight
to slightly exuous, simple or branched, 4−7-septate, smooth, brown below,
variegated pigmented towards the apex, 135−189 × 12.0−16.5 µm, cell basal
lobed 21−45 µm wide. C polytretic, integrated, terminal
and intercalary, pale brown to dark brown to reddish brown, 19.5−25 × 5.0−6.5
µm. C limoniform to ovoid, unicellular, smooth, thick-walled, pale
brown to dark brown or reddish brown, 7.5−22.5 × 5−12 µm, forming acropetal
chains. Teleomorph unknown.
N: Diplococcium was described by Grove (1885) with the type species
D. spicatum Grove from dead wood in England. Braun et al. (1996), Castañeda-
Ruiz & Kendrick (1991), Cruz et al. (2007), Goh & Hyde (1998), Hernández-
Restrepo et al. (2012), Ma et al. (2012), Pirozynski (1972), and Wang &
Sutton (1998) documented 28 accepted species of Diplococcium, which are
characterized by terminal or intercalary polytretic conidiogenous cells that
produce 0–7-septate conidia in acropetal chains. Diplococcium capitatum Piroz.,
D. hughesii C.J.K. Wang & B. Sutton, and D. parcum Hol.-Jech. are also species
that produce exclusively aseptate conidia. Diplococcium capitatum diers from
D. variegatum by conidiogenous pores conned to a swollen terminal cell
that produces short cylindric or broadly ellipsoid conidia (Pirozynski 1972);
D. hughesii is separated by its subglobose oval to oblong smaller (7–12 ×
5–7µm) conidia and highly branched longer conidiophores (Holubová-Jechová
1982, Wang & Sutton 1998), while D. parcum produces smaller (8.5–13 × 5.5–8
µm) ovate to obpyriform or ellipsoidal conidia (Holubová-Jechová 1982).
e authors express their sincere gratitude to Dr. De-Wei Li and Prof. Dr. Bryce
Kendrick for their critical review of the manuscript. e authors thank the Program
of Research on Biodiversity in the Brazilian semi-arid (PPBIO semi-arid/ Ministry
of Technology and Science). RFCR is grateful to the Cuban Ministry of Agriculture
and “Programa de Salud Animal y Vegetal,” project P131LH003033 Cuban Ministry of
Science, Technology and Environment for facilities.